Welcome to version 3.0 of the Forensic Photoshop blog - now the Forensic Multimedia Analysis blog. With the latest developments in purpose built software and hardware for the analysis of multimedia, we move the discussion beyond a single piece of software to include all the major developers, image processing fundamentals, court cases, upcoming training offerings, and product reviews.

Thursday, September 20, 2012

Update to AmpedFIVE

There a new update to AmpedFIVE that addresses the issue of the potential for the addition of colour information when performing unsharp mask or laplacian sharpening. Build 4156 adds the choice between Intensity and Color mode in Unsharp Masking and Laplacian Sharpening.

We've done this exercise in my Photoshop classes. How do you perform USM without adding colour to your image? How do you answer the answer, "Did you add anything to this image?" if you use USM in your workflow - and don't control the processes in some way so as to limit the adjustments to only the lightness/intensity information.

There's a number of ways to accomplish this task in Photoshop, as long as you know what's happening. You can work in LAB, and only sharpen the L channel. You can work on an adjustment layer and control the effect with the appropriate blending mode. In AmpedFIVE, it's now much easier - just select Intensity when performing your sharpening. How cool is that?!

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Copyright notice: all content is protected by US and International Law. Original materials copyright 2017 - Jim Hoerricks. All other material/links are copywritten by their respective owners. The information contained herein may not be reproduced in any form without the express written consent of the owners. The views and opinions expressed on this site are not necessarily those of any of the author's employers or clients - either past or present.

Thank you for visiting the Forensic Video and Image Analysis Blog

If you've made it down this far, thank you. It is my pleasure to host this discussion on the forensic video and image analysis. If you have any questions about the techniques seen here, or if you want to ask any question, just send me a note. I'd be glad to get back to you. Again, thank you for your interest in digital multimedia forensics.